Click around this website for some of the best information, provided by many of the finest trumpet people in the world!
The ITG Youth site contains a wealth of trumpet information for student trumpeters. I find these links to masterclass articles to be of special interest:
Trumpet Page
International Trumpet Guild Youth Site
Click around this website for some of the best information, provided by many of the finest trumpet people in the world!
Listening - The Primary Musical Skill by Keith Johnson
Listening by Chris Gekker
U.S. Army Field Band Trumpet Lesson:
Range and Endurance
If you double click through to YouTube while the video is playing, you will find a few more great lessons!